CVE-2026-25740 — Privilege escalation to the `CAP_NET_RAW` capability via the `programs.captive-browser` NixOS module
captive browser, a dedicated Chrome instance to log into captive portals without messing with DNS settings. In 25.05 and earlier, when programs.captive-browser is enabled, any u…
Published: 2026-02-09 · CVSS: 5.8 · CVSS 4.0
captive browser, a dedicated Chrome instance to log into captive portals without messing with DNS settings. In 25.05 and earlier, when programs.captive-browser is enabled, any user of the system can run arbitrary commands with the CAP_NET_RAW capability (binding to privileged ports, spoofing localhost traffic from privileged services...). This vulnerability is fixed in 25.11 and 26.05.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7